Yawning is thought to cool the brain and make it more alert. Simultaneous yawning may occur when a group of people are all breathing the same warm, stale air. Or contagious yawning may have evolved to help groups remain vigilant against danger.
A yawn is a reflex consisting of the simultaneous inhalation of air and the
stretching of the ... This "contagious" yawning has also been observed in
chimpanzees, dogs, birds, and reptiles...
Mar 16, 2014 ... About half of adults yawn after someone else yawns due to a universal
phenomenon called “contagious yawning.” Researchers at Duke ...
Jan 11, 2016 ... Contagious yawning isn't a myth. It's a real, scientifically demonstrable
phenomenon. We yawn when we see someone else yawn. The sound ...
Jun 11, 2015 ... What is yawning? And why do we do so much of it? Neuroscientist and yawn
expert Robert Provine says it's “ancient and autonomic.” It stems ...
Contagious yawning is associated with the same parts of the brain that deal with
empathy, according to a recent study. Learn about contagious yawning.
Update (Jan 2016): I wrote this answer several years ago. Though it currently has
accumulated ... Do you all have any theories as to why yawning is contagious? Is
yawning contagious for blind people? Yawning: Why do humans yawn?
Dec 10, 2014 ... Why do we yawn? The center of many a scientific study, researchers have
several theories about the science behind this contagious ...
Dec 15, 2011 ... So-called contagious yawning is a type of psychological effect that happens only
in response to seeing, hearing, or reading about yawning.
Jul 8, 2016 ... People high in psychopathic personality traits often don't "catch" the contagious
yawn, a new study finds.